There is plenty of qualified people here to point you in the correct direction for rooting your device. However changing the IMEI is something we don't condone or discuss in the forums. That is the signature of the device which is registered with your name and the carrier and doing so is a complete no no...
Come on man, some apps given a grace period, free trial for a week, 15 days or 30days,
changing the imei code of the phone may "renew" and gain another new free trial period.
Btw,
is there any luck / tut on changing IMEI code of Samsung Note 3 N9005?